Optical phased array device and lidar device including the same

An optical phased array device package, comprising:

• a base;
• an optical phased array device on the base;
• and
• a connection member connecting the base to the optical phased array device,
• wherein the optical phased array device includes
• a substrate,
• a light distribution unit configured to distribute input light along a plurality of paths as distributed light,
• a light modulator configured to modulate a phase of the distributed light to establish phase-modulated light,
• an antenna configured to emit the phase-modulated light,
• a clad surrounding the light distribution unit, the light modulator, and the antenna, the clad including a first surface facing the substrate and a second surface opposite the first surface, and
• a reflective layer facing the second surface of the clad, the reflective layer configured to reflect the phase-modulated light emitted from the antenna so that reflected light is emitted an exterior environment that is external to the optical phased array device based on passing through the substrate.

A LiDAR device, comprising:

• a light source;
• a steering unit;
• a detector;
• and
• a processor,
• wherein the steering unit includes
• a substrate,
• a light distribution unit configured to distribute input light along a plurality of paths as distributed light,
• a light modulator configured to modulate a phase of the distributed light to establish phase-modulated light,
• an antenna configured to emit the phase-modulated light,
• a clad surrounding the light distribution unit, the light modulator, and the antenna, the clad including a first surface facing the substrate and a second surface opposite the first surface, and
• a reflective layer facing the second surface of the clad, the reflective layer configured to reflect the phase-modulated light emitted from the antenna so that reflected light is emitted to an exterior environment that is external to steering unit based on passing through the substrate.